FOXO1 调节脑垂体腺体内 Neurod4 的表达
Caitlin E Stallings1, Pratyusa Das1, Sandria W Athul1
1Department of Physiology, Southern Illinois University, Carbondale, IL, USA.
Molecular and cellular endocrinology
|December 24, 2023
概括
叉头盒蛋白1 (FOXO1) 直接调节对 pituitary somatotrope 分化至关重要的基因. 这种转录因子控制了Gh1和Neurod4等关键基因,这些基因对细胞发育和激素产生至关重要.
科学领域:
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 垂体腺发育依赖于细胞分化和激素合成的转录因子.
- 已知FOXO1是体培体分化和功能的调节者.
- 之前的研究表明,FOXO1会影响体内基因中的Gh1,Neurod4和Pou1f1等基因.
研究的目的:
- 调查FOXO1在调节体内热因组分化的基因中所起的直接作用.
- 为了确定新型FOXO1结合位点及其在体类细胞中的功能意义.
主要方法:
- 用FOXO1抑制剂治疗GH3体型细胞.
- 在GH3细胞中Fox1的CRISPR/Cas9介导的基因删除.
- 染色体免疫沉测序 (ChIP-seq) 用于识别FOXO1的结合部位.
- 报告员测试以评估FOXO1结合部位的增强剂活性.
主要成果:
- 抑制或删除FOXO1显著降低了GH3细胞中Neurod4和Gh1的表达.
- ChIP-seq在Neurod4,Gh1和Pou1f1基因附近发现了新的FOXO1结合部位.
- 在Neurod4基因中的FOXO1结合部位表现出增强剂活性,特别是在索马托托普类细胞中.
结论:
- FOXO1直接调节参与体内热因组分化的关键基因.
- FOXO1 作为 Neurod4 等基因的转录激活剂,有助于 pituitary 细胞的发育.
- 这些发现阐明了垂体腺转录控制中的关键机制.
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